CN110378159A - For the light fixture used in barcode reader and its associated device and method - Google Patents
For the light fixture used in barcode reader and its associated device and method Download PDFInfo
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- CN110378159A CN110378159A CN201910294769.1A CN201910294769A CN110378159A CN 110378159 A CN110378159 A CN 110378159A CN 201910294769 A CN201910294769 A CN 201910294769A CN 110378159 A CN110378159 A CN 110378159A
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- illumination light
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10712—Fixed beam scanning
- G06K7/10722—Photodetector array or CCD scanning
- G06K7/10732—Light sources
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
- G06K7/10831—Arrangement of optical elements, e.g. lenses, mirrors, prisms
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
- G06K7/10881—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices constructional details of hand-held scanners
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
- G06K7/1096—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices the scanner having more than one scanning window, e.g. two substantially orthogonally placed scanning windows for integration into a check-out counter of a super-market
Abstract
At least some embodiments of the invention are related to for providing optical arrangement used in the illumination light issued as barcode reader.In some embodiments, which includes: light source；Lens are located in the path of the illumination light emitted by light source, and wherein lens can operate with collimated light and redirect central shaft；And window, it is located in the path of redirected and collimation light, wherein window can be operated to change illumination light, so that resulting illuminating bundle has the depth-width ratio less than 8 to 25.
Description
Background
The one-dimensional symbol and two-dimensional symensional symbol of such as bar code etc are commonly used in identifying product/object for arriving accompanying by them
Product/cargo.In order to decode bar code, barcode reader is used by each operator or is automatically used, and thus reader is swept
Bar code data is retouched, decodes and transmitted to computer equipment appropriate.In general, these barcode readers include as being used for optics
The image capture component of ground capture image data, be used to help to aim in the desired direction the aiming light component of reader and
Component as illuminace component for providing enough light to capture for correct data.In addition, being used such as hand-held
In, above-mentioned component must be to be suitable for the shape factor close packing of special-purpose.This generates to barcode reader
The demand of the Persisting exploitation of component, to realize supplementary functions.
Summary of the invention
In embodiment, the present invention is a kind of for the light fixture used in barcode reader.The light fixture
It include: light source, which is operable to emit illumination light along first path, and illumination light has central axis；Lens, should
Lens are located in the first path of illumination light, and lens are configured for redirecting central axis, to generate the center of redirection
Axis and along the second propagated illumination light, the central axis of central axis and redirection is not parallel relative to each other, in redirection
Intersection between the first plane of mandrel definition and the second plane, for the first plane perpendicular to the second plane, lens include leaning near lightning
First lens surface in source, the first lens surface are located in first path and are limited by the first free shape multinomial, and lens are also
Including the second lens surface far from light source, the second lens surface is located in the second path and by the second free shape multinomial
It limits；And window, the window are located in the second path of illumination light, window includes first window part and the second window portion
Point, first window part is configured for the first part along third propagated illumination light, and the first part of illumination light is
The a part of the irradiation of illumination light on first window part, third path have at least 25 degree of diverging along the first plane
Angle, has at most 8 degree of the angle of divergence along the second plane, and the second window portion is configured for illuminating along the 4th propagated
The second part of light, the second part of illumination light are a part of the irradiation of illumination light on the second window portion, the 4th path
There is at most 20 degree of the angle of divergence along the first plane, and there is at most 8 degree of the angle of divergence along the second plane.
In another embodiment, the present invention is a kind of for the light fixture used in barcode reader.The photograph
Bright component includes: light source, which is operable to emit illumination light along first path, and illumination light has central axis；
And lens, the lens are located in the first path of illumination light, lens are configured for redirecting central axis, to generate weight
The central axis of orientation and along the second propagated illumination light, the central axis of central axis and redirection is not parallel relative to each other, weight
Intersection between the first plane of center axis limit of orientation and the second plane, the first plane include perpendicular to the second plane, lens
Close to the first lens surface of light source, the first lens surface is located in first path and is limited by the first free shape multinomial
Calmly, lens further include the second lens surface far from light source, and the second lens surface is located in the second path and by the second freedom
Shape multinomial limits, wherein the first lens surface and the second lens surface are arranged such that along central axis and the first lens
First tangential plane of plane tangent and along the second tangent tangential plane of the central axis of redirection and the second lens surface with
The intersection of one inclination angle.
In yet another embodiment, the present invention is a kind of mesh calibration method that irradiation will be read by barcode reader.It should
Method includes: offer light source, which is operable to emit illumination light along first path, and illumination light has center
Axis；Make the lens in first path of the illumination light by being located at illumination light, lens are configured for redirecting central axis, to produce
The raw central axis redirected and along the second propagated illumination light, the central axis of central axis and redirection is uneven relative to each other
Row, the intersection between the first plane of center axis limit of redirection and the second plane, the first plane is perpendicular to the second plane, lens
Including the first lens surface close to light source, the first lens surface is located in first path and by the first free shape multinomial
Limit, lens further include the second lens surface far from light source, the second lens surface be located in the second path and by second oneself
It is limited by shape multinomial；And when making illumination light pass through the operation of lens, make illumination light by being located at the second of illumination light
Window in path, window include first window part and the second window portion, and first window part is configured for along
The first part of three propagated illumination lights, the first part of illumination light are one of the irradiation of illumination light on first window part
Part, third path have at least 25 degree of the angle of divergence along the first plane, have at most 8 degree of diverging along the second plane
Angle, the second window portion are configured for the second part along the 4th propagated illumination light, and the second part of illumination light is
The a part of the irradiation of illumination light on the second window portion, the 4th path have at most 20 degree of diverging along the first plane
Angle, and there is at most 8 degree of the angle of divergence along the second plane.
By referring to the following drawings, description and any claim followed, these and other feature, aspect and the disclosure
The advantages of will become better understood.
Detailed description of the invention
Fig. 1 illustrates the front perspective view and rear perspective view of barcode reader according to an embodiment of the present invention.
Fig. 2 illustrates the schematic block diagram of a part of barcode reader according to an embodiment of the present invention.
Fig. 3 A illustrates the perspective view of some components of barcode reader according to an embodiment of the present invention.
The top cross-sectional view of the component of Fig. 3 B pictorial image 3A.
Fig. 4 illustrates the sectional view of some components of barcode reader according to an embodiment of the present invention.
Fig. 5 A illustrates the preceding perspective section view according to an embodiment of the present invention for the optical arrangement used in light fixture
Figure.
The preceding perspective partial cut-way view of the optical arrangement of Fig. 5 B pictorial image 5A.
The rear the perspective sectional view of the optical arrangement of Fig. 6 A pictorial image 5A.
The rear perspective partial cut-way view of the optical arrangement of Fig. 6 B pictorial image 5A.
Fig. 7 A and Fig. 7 B illustrate the rear perspective view and front perspective view of lens according to an embodiment of the present invention respectively.
Fig. 8 A and Fig. 8 B illustrate the rear perspective view and front perspective view of window according to an embodiment of the present invention respectively.
The overhead, partial cut-away view of the window of Fig. 9 pictorial image 8A and Fig. 8 B.
Figure 10 illustrates the illumination light of projection according to an embodiment of the present invention on the work surface.
The radiation intensity of the illumination light of Figure 11 pictorial image 10.
Figure 12 illustrates the radiation intensity of the illumination light of Figure 10 along level cross-sectionn sample measurement.
It will be appreciated by those skilled in the art that the element in attached drawing is shown for simplicity and clarity, and not necessarily to scale
It draws.For example, the size of some elements in element in attached drawing can be amplified to help improve to this relative to other element
The understanding of inventive embodiments.
Device and method composition is indicated by the way that ordinary symbol is in place in the accompanying drawings, the expression is only
It shows and understands those of the related specific detail of the embodiment of the present invention in order to avoid because having benefited from description herein to art technology
The obvious details of personnel and obscure the disclosure.
Specific embodiment
Referring to Fig.1, exemplary bar codes reader 100 is shown, with shell 102, trigger 104 and shell
Window 106, shell 102 have the chamber for accommodating internal part.When barcode reader 100 is placed on supporting support (not
Show) in table top on when, which can be used as stationary workstation and uses in the handsfree mode.Work as bar code
Reader 100 in table top (or other surfaces) by from when picking up and being maintained in the hand of operator, the barcode reader 100
It can use in a handheld mode.In the handsfree mode, product can be slid over, is swiped through or be presented to window 106.In hand-held mode
Under, barcode reader 100 can be targeted to the bar code on product, and can press trigger 104 manually with initiation pair
The imaging of bar code.In some implementations, can save supporting support, and shell 102 can also present it is other hand-held or non-
Handheld form.
Fig. 2 illustrates the schematic block diagram of a part of barcode reader 100 in accordance with some embodiments.It should be appreciated that Fig. 2
It is not drawn on scale.Barcode reader 100 in Fig. 2 includes following component: (1) the first image-forming assembly 110 comprising first
Linear imaging sensor 112 and the first lens subassembly 114；(2) second image-forming assemblies 116 comprising the second linear imaging sensing
Device 118 and the second lens subassembly 120；(3) light fixture 122 comprising light source 129, illuminating lens 131 and window 133, window
Mouth 133 includes the multiple portions for being designed to propagate light in different ways；(4) optical assembly 123 is aimed at, has and aims at light source
125 and finder lens component 127 (also referred to as aiming beam reshaper)；(5) printed circuit board (PCB) 124 supports First Line
Property imaging sensor 112 and the second linear imaging sensor 118 and light source 129；(6) controller 126 are located at PCB
On 124 and it is communicatively coupled to the first linear imaging sensor 112 and the second linear imaging sensor 118 and illumination
Source 129；And (7) memory 128, it is connected to controller 126.It, can be by certain at the part of reference barcode reader
A little components are grouped and are known as " imaging engine ".In some cases, it may be said that imaging engine includes as (multiple) imaging sensor
Such image capture component.In other cases, it may be said that imaging engine includes add ons, such as aiming optical assembly
And/or light fixture.
First linear imaging sensor 112 and the second linear imaging sensor 118 can be CCD or CMOS linear imaging biography
Sensor generally includes the multiple light sensitive pixel elements arranged with one-dimensional array.First linear imaging sensor 112 and the second line
Property imaging sensor 118 be operable to detection respectively by the first lens subassembly 114 and the second lens subassembly 120 along corresponding
Optical path or axis 132,134 pass through the light that window 106 captures.In general, each corresponding linear imaging sensor and imaging len
Component to be designed to operate together using for capture from the light of bar code scattering, reflection or transmitting be used as along it is corresponding linearly
The pixel data in one-dimensional visual field (FOV) that FOV plane extends.However, each lens/imaging sensor is to (also referred to as optics
Component) with different parameter configurations.
In presently described embodiment, the first image-forming assembly 110 is designed to the phase extended between FWD1 and FWD2
To reading bar code within the scope of remote operating distance.In some embodiments, FWD1 is apart from about 24 inches of window 106, and
FWD2 is apart from about 600 inches to 680 inches of window 106.In some embodiments, FWD2 extends beyond 680 inches.In addition,
Image-forming assembly 110 captures the light from relatively narrow FOV 136.On the other hand, the second optical module 116 is designed in NWD1
Bar code is read within the scope of the relatively near operating distance extended between NWD2.In some embodiments, NWD1 is apart from window
106 about 0 inches, and NWD2 is apart from about 28 inches to 32 inches of window 106.In addition, the capture of image-forming assembly 116 comes from phase
To the light of wide FOV 138.
It shows to the Illustrative of the component layout of Fig. 2 in the perspective view of Fig. 3 A and the top cross-sectional view of Fig. 3 B,
Show some components of the reader 100 of part assembling form.In this embodiment, light fixture is located in the first imaging group
Between part and the second image-forming assembly.In preferred disposition, light fixture is positioned to compared to the second (close) image-forming assembly closer to the
One (remote) image-forming assembly.In addition, in the embodiment shown in Fig. 3 A and Fig. 3 B, the first linear imaging sensor 112 and the second line
Property imaging sensor 118 is located on substrate (such as PCB 124), so that the first linear imaging sensor 112 and the first lens group
The distance between part 114 is different from the distance between the second linear imaging sensor 118 and the second lens subassembly 120.In addition, at
As component and aim at component can be positioned so that their own visual field (can be arranged to coplanar) and they along it
The respective planes of extension form the inclination angle relative to PCB plane, longitudinal direction and transverse direction side of the PCB plane by PCB 124
To restriction.
It can be seen that the more preferable view of the angled arrangement, the Fig. 4 illustrate the sectional view of reader 100 in Fig. 4.From
As can be seen that light source 129 is arranged on circuit board 124 in the figure, circuit board 124 is extended with angle identical with handle 104
Into handle 104.In a preferred embodiment, circuit board 124 and center head axis 145 are (in the reading of use (multiple) linear imager
Take parallel with FOV plane 139 in the case where device) between angle between 70 degree and 80 degree, and be preferably about 75 degree,
This corresponds to the preferred ergonomic designs that reader 100 is kept and aimed at for reader user.As the configuration
As a result, light source 129 is directed toward relative to reader visual field in downward direction together with its central illumination axis 137.Keep such light
Directionality may cause reduced performance, because desired target may be not achieved in illumination level appropriate, especially in reader
Can opereating specification distal end.Illumination light and further can be redirected by realizing certain optical elements in light fixture
Change its beam characteristics to be better suited for preferably application and to solve the problems, such as this.
Fig. 5 A- Fig. 6 B illustrates the embodiment of optical element arrangement 200, can be in light fixture and barcode reader
It realizes, such as those disclosed herein.Arrangement 200 includes lens 202 and window 204, is both located at and is emitted by light source 206
Illumination light path in, light source 206 is illustrated as light emitting diode (LED) in this case, be located at PCB 208 on.It should
Arrangement can with it is previously described imaging and aiming elements be used in combination, thus light fixture be configured for irradiate positioned at along
The target in one or more FOV 210 that FOV plane 212 extends.Also, it should be understood that window 204 need not but can be with
Be formed as a part of entire shell window.In other words, it can have using the barcode reader of arrangement 200 in illumination light
Path in position additional window (as shell window 106).
It can be best seen from from the cross-sectional view of Fig. 5 B and Fig. 6 B, illumination light has central axis 214, in some embodiments
In, central axis 214 can be limited by such as lower axis: illumination light along the axis there is peak radiant intensity and/or the axis to hang down
Directly in PCB 208 and positioned at the center of light source 206.Since central axis 214 and imaging FOV plane 212 are not parallel, thoroughly
It is appropriate preferably to irradiate (multiple) that mirror 202 and window 204 are configured for the illumination light redirected and forming is emitted
Target.This can be accomplished by the following way: lens 202 being located in the path of the illumination light emitted by light source 206, made
It obtains lens 202 and redirects central axis 214 so as to along more desirable direction propagation.In the illustrated embodiment, 202 weight of lens
Central axis 214 is oriented, so that the central axis 216 redirected is parallel with imaging FOV 210 and/or is overlapped, and further in
Mandrel 214 is not parallel.Other than redirecting the central axis 214 of illumination light, lens 202 are also along different from original path new
Propagated illumination light.In doing so, illumination light is collimated into the light for leaving lens 202 has 8 degree in vertical direction
Maximum diverging (being referred to as extending) and the degree that there is 20 degree of maximum to dissipate in the horizontal direction.Therefore, lens 202
" collimation lens " can be referred to as.In some embodiments, diverging in the horizontal direction and diverging vertically can be distinguished
It is limited by the diverging along the first plane 218 and along the diverging of the second plane 220, wherein the two planes are intersected with an angle of 90 degrees.Separately
Outside, the intersection between the first plane 218 and the second plane 220 can be conllinear with the central axis 216 of redirection.In addition, first is flat
Face 218 can with imaging FOV 210 it is Chong Die, can be parallel with FOV plane 212, and/or can it is coplanar with FOV plane 212 (that is,
First plane 218 and FOV plane 212 are same planes).
The more detailed view of lens 202 is provided in Fig. 7 A and Fig. 7 B.Specifically, lens 202 include: the first lens measure
Face 222 is oriented to when lens 202 are located in arrangement 200 close to light source 206；And second lens surface 224,
It is oriented to when lens 202 are located in arrangement 200 far from light source 206.Due to this positioning of lens 202, the first lens
Surface 222 terminates in the first path of illumination light, which is generated by the illumination light that lighting source 206 is emitted, and
And second lens surface 224 terminate in the second path of illumination light, which is reset by lens 202 from its first path
It is generated to illumination light.Each of first surface 222 and second surface 224 are limited by corresponding free shape multinomial.
In other words, each of first surface and second surface are all not in relation to axis translation or rotation pair perpendicular to mean level of the sea
Claim.In embodiment, each of surface 222,224 can be defined by the formula:
Wherein:
C is curvature；
r2It is the radial coordinate on surface and is equal to x2+y2
K is the constant of the cone on surface；
M and N is polynomial maximum order；
I and j is the operation index for indicating the polynomial order；
AijIt is coefficient associated with polynomial order；
EijIt is higher order polynomial (for example, xiyjForm)；And
X and y is the point on X/Y coordinate plane, which, and can be to reset perpendicular to the central axis of redirection
To central axis centered on.
Other than free shape multinomial, first surface 222 and second surface 224 are arranged such that they form wedge
Shape.In embodiment, by the point of central axis 214 with the tangent plane of the first lens surface 222 in redirection
There are inclinations angle between another plane that second surface 224 is tangent to limit wedge shape at the point of mandrel 216.In preferred embodiment
In, the inclination angle is between 25 degree to 40 degree.In addition, lens 202 can be configured so that first surface 222 and second surface
Any of 224 have the depth-width ratio between 1.25 to 1 and 1.75 to 1, as respectively along Y-axis shown in Fig. 7 A and Fig. 7 B
As X-axis expression.
The design of lens 202 can be particularly advantageous, because it can permit in horizontal stripes while being reset
To and optically focused.It is used in combination when with the linear imaging component for being designed to capture the image data extended along horizontal direction
When, this lighting pattern is particularly useful.Therefore, in some embodiments, lens 202 can be provided on the axis between 25x and 35x
Gain.In embodiment, on-axis gain is referred to as the signal gain realized along the respective center axis of signal.
Referring back to Fig. 5 A- Fig. 6 B and Fig. 8 A- Fig. 8 B, it is redirected once illumination light has passed through lens 202, it can lead to
Window 204 is crossed, which includes first window part 226 and the second window portion 228.First window part 226 is configured
For for some (for example, first) part along third propagated general ambient light light.Illumination light along third propagated
Part be usually the part being radiated on first window part 226.In embodiment, first window part is formed with multiple
The lens array of lens element.As the example lens array in Fig. 9 overhead, partial cut-away view in it is best seen in, each lens
Element can have in a first direction variation (in X-direction in the fig. 8b along Z axis measurement positioning surface) and
The first lens element (along the surface of the positioning of Z axis measurement in Y direction in the fig. 8b) is kept constant in second direction
Surface 230.In addition, each lens element can also have variation in a first direction (along Z in X-direction in fig. 8 a
The surface of the positioning of axis measurement) and kept constant in a second direction (along Z axis measurement in Y direction in fig. 8 a
The surface of positioning) the second lenticular element surfaces 232.In the specific embodiment shown in, each lens element is formed along vertical
The cylindrical lens that direction extends.In the modification that each lens element is the embodiment of cylindrical lens, the first lenticular element surfaces
It can be limited by the semicircle with the radius of curvature between 0.4mm and 0.6mm.In another modification of the embodiment, second
Lenticular element surfaces can be limited by the semicircle with the radius of curvature between 1.4mm and 1.6mm.In addition, in embodiment, often
A lens element has the pitch (pitch) (that is, center to center spacing) of 0.4mm to 0.6mm.
Second window portion 228 is configurable for some (for example, second) along the 4th propagated general ambient light light
Part.The part along the 4th propagated of illumination light is usually the part being radiated on the second window portion 228.Some
In embodiment, the second window portion includes transparent optical material, can operate to allow light through the transparent optical material and not have
There are substantial interference or change.In some embodiments, the second window portion includes that can operate will include general ambient light light
The illuminating bundle of second part changes into the material of predetermined properties, wherein this predetermined properties cause by second of general ambient light light
Divide the light beam formed different from the light beam that the first part by general ambient light light is formed.It should be obvious that the second window portion
Divide 228 can position relative to first window part 226 with any relationship, and may further include multiple discontinuous portions
Point.In a preferred embodiment, the area ratio of first window part 226 and the second window portion 228 is between 3 to 2 and 4 to 1.
Referring back to Fig. 5 A- Fig. 6 B, when propagating through window 204, illumination light is projected with lighting pattern, the lighting pattern
It is illumination light by the first part of first window part 226 and second by the second window portion 228 of illumination light
The final combination divided.In some embodiments, window 204 is configured so that first window part 226 is passed along following path
Broadcast the first part of illumination light, the path along the first plane 218 at least 25 degree the angle of divergence and along the second plane
220 have at most 8 degree of the angle of divergence.In addition, window 204 may be configured so that the second window portion in those embodiments
Points 228 along following propagated illumination light second part, which has at most 20 degree of diverging along the first plane 218
Angle and there is at most 8 degree of the angle of divergence along the second plane 220.Alternatively, in those embodiments, window 204 can be by
It is arranged so that the second window portion 228 along the second part of following propagated illumination light, the path is along the first plane
218 at most 8 degree the angle of divergence and there is at most 8 degree of the angle of divergence along the second plane 220.In some embodiments,
The combination of lens 202 and window 204 provides the on-axis gain between 8x and 22x.
The exemplary projection of illumination light 300 is depicted in figs. 10-12, and in Figure 10, illumination light 300 is illustrated as throwing
It penetrates on working surface 302, in Figure 11, the radiation intensity of illumination light 300 illustrates the diverging of light, and in Figure 12, spoke
Intensity is penetrated to be plotted as (being considered that is, being parallel to along the level cross-sectionn sample of illumination light 300 shown in Figure 11
The direction of first plane 218 extends) angular displacement function.Assess illumination light 300, it may be noted that although it is in level side
Upwards by integrally stretching, spends so that it extends about 15 degree -20 to the right and extend about 10 degree of -20 degree to the left, still
It also suffers restraints in vertical direction, so that it extends about 2.5 degree in the upward and downward directions.In addition, illumination
Light 300 include two major parts, have higher than 6 radiation intensity relatively bright part 306 and have lower than 6 and height
In the relatively dark-part 308 of 1 relative intensity.Such pattern be two individual window portions 226,228 so that according to
The second part by the second window portion 228 of Mingguang City is superimposed upon first by first window part 226 of illumination light
The mode in a part divided propagates the result of light.This superposition of the second part of illumination light in the first part of illumination light
Lead to relatively bright part 306, it may for the illumination of the target of the remote working range positioning closer to barcode reader
It is particularly useful.In some embodiments, illumination light is configured such that when illumination light leaves window 204, illumination light 300
Radiation intensity total amount 50% and 75% between in centre coordinate point (in some embodiments, be central axis in redirection
Point on 216) +/- 5 degree within.Its example illustrates in Figure 12, horizontal along the level of illumination light 300 shown in Figure 11
Cross-section sample (for example, first plane 218) carries out radiant intensity measurement, wherein center X-coordinate value corresponds to the center redirected
Point on axis 216.
This lighting pattern may be particularly useful for irradiation linear bar code, which will be by its FOV and light
300 overlappings or the linear imager for including by light 300 capture, because luminous energy concentrates in the region of FOV.In addition, working as
With multiple image-forming assemblies (for example, Fig. 2) (its can operate in different operating distance range (for example, remote operating distance range
With nearly operating distance range) on capture image data) barcode reader in use, illumination light 300 relatively highlights
306 relatively narrow diverging and higher radiation intensity is divided to can be used for sufficiently irradiating the proximate distal ends positioned at remote operating distance range
Target.Addedly, relatively dark-part 308 it is wider diverging and still horizontal enough radiation intensity with come from it is relatively bright
The light combination of part 306 is located at the target within the scope of nearly operating distance for suitably irradiation.In addition, passing through the by illumination light
The relatively dark-part 308 that the first part of one window portion 226 generates can according to certain applications need to be diverted it is specific
Image-forming assembly.For example, in more imagers configurations as described above, illumination light is passed through into first window part 226 the
A part is turned to and be may be advantageous by the side that following imaging component occupies, which is configured in relatively wide
FOV (FOV usually associated with nearly operating distance range, rather than phase usually associated with remote operating distance range
To narrow FOV) on capture image data.
It will be appreciated that though introduction associated with lens subassembly disclosed herein adjusting has been combined linear transducer and shows
It presents to example property, but they are equally applicable to the lens subassembly with other, in conjunction with non-linear (for example, 2D) imaging sensor
It adjusts.In other words, structures and methods especially associated with disclosed lens subassembly and pedestal should not necessarily be limited by using line
Property imaging sensor, and be interpreted as expanding to the application with other imaging sensors, similar 2D imaging sensor, usually
With the mutually orthogonal photoarray being arranged in substantially flat on surface.
Specific embodiment has been described in the above specification.However, those of ordinary skill in the art understand, can make
The scope of the present invention that various modifications and change are illustrated without departing from following claims.Therefore, the description and the appended drawings quilt
It is considered exemplifying and non-limiting meaning, and all this modifications are intended to be included in the range of this introduction.
In addition, described embodiment/example/realization is not construed as mutually exclusive, and should be understood potentially can group
It closes, if such combination is allowed in any way.In other words, any of previous embodiment/example/realization
Disclosed any feature may include in any of other previous embodiment/example/realizations.In addition, unless explicitly claimed
Remaining step of correlation method can not or not needed using other sequences, and otherwise the step of any method disclosed herein is equal
It is understood not to that there is any particular order.In addition, at least some attached drawings may or may not be drawn to scale.
These benefits, advantage, issue-resolution and any benefit, advantage or solution may be made to occur or become
(multiple) any elements more outstanding are not construed as the key of any or all claim, required or necessary spy
Sign or element.The present invention is individually defined by the appended claims, and is appointed including what is made during the application is in pending status
All equivalents of these claims after what is modified and publishes.
In addition, in the document, such as first and second, the relational terms of top and bottom or the like can individually be used to
One entity or movement are differentiated with another entity or movement, and not necessarily requires or implies between these entities or movement
With any actual this relationship or sequence.Term " composition ", " composition has ", " having ", " having ", " comprising ", " including
Have ", "comprising", " containing " or their any other modification be intended to cover nonexcludability and include, so as to be configured to, have, wrap
Include, process, method, article or device comprising an element list not only include those elements may also include to the process, method,
Article or the not expressly listed or intrinsic other element of device.With " composition has one ", " having one ", " including one ", " include
The element of one " beginning, in the case of more multi-constraint condition, however not excluded that have in composition, have including comprising the element
Process, method, in article or device with the presence of other identical element.Term " one " and "one" be defined as one or more
It is multiple, unless explicitly stated otherwise herein.Term " substantially ", " generally ", " approximation ", " about " or these terms are appointed
What his version is defined as approaching as those skilled in that art understand, and in a nonlimiting examples
In, these terms are defined as within 10%, in another embodiment within 5%, in another embodiment 1% with
It is interior, and in another embodiment within 0.5%.Term " coupling " used herein is defined as connection, although not
Must be directly connected to be also not necessarily mechanical connection." configuration " equipment or structure are at least with this kind of side in some way
Formula is configured, but can also be configured in ways that are not listed.
It is appreciated that some embodiments may include one or more general or specialized processors (or " processing apparatus "), such as
Microprocessor, digital signal processor, the processor of customization and field programmable gate array (FPGA) and the journey that uniquely stores
Sequence instructs (including both software and firmware), and the program instruction control one or more processors uniquely stored are together with certain
A little non-processors realize some, the most or repertoire of approach described herein and/or device.Alternatively, some
Or repertoire can be realized by the state machine without storage program instruction, or at one or more specific integrated circuits (ASIC)
Middle realization, wherein certain combinations of various functions or certain functions are implemented as customized logic.Certainly, it is possible to use both sides
The combination of method.
In addition, one embodiment can be implemented as computer readable storage medium, which has
The computer-readable code being stored thereon, for being executed to (for example including processor) computer programming as retouched herein
It states and claimed method.The example of this computer readable storage medium includes but is not limited to hard disk, CD-ROM, optical storage
Device, magnetic memory device, ROM (read-only memory), PROM (programmable read only memory), (erasable programmable is read-only by EPROM
Memory), EEPROM (electrically erasable programmable read-only memory) and flash memory.Additionally, it is contemplated that those of ordinary skill in the art
Although make significantly made great efforts by the possibility that such as pot life, current techniques and economic consideration actuate and many designs choosing
It selects, but when obtaining concepts disclosed herein and guidance of principle, easily can will generate such software with least test and refer to
It enables and program and IC.
The abstract of the disclosure is provided to allow reader's rapidly clear the nature of the disclosure of the art.The abstract is submitted, and
Understand that the abstract will not be used to interpret or limit the range or meaning of claims.In addition, in above-mentioned specific embodiment,
It can be seen that each feature is grouped into together in embodiments for the purpose for making disclosure integration.This disclosure side
Method is not necessarily to be construed as reflecting that claimed embodiment needs more spies compared with being expressly recited in every claim
The intention of sign.On the contrary, as the following claims reflect, subject matter is all special less than single disclosed embodiment
Sign.Therefore, thus following following claims, which is incorporated into, illustrates, wherein each claim is as individually claimed
Theme represents its own.
Claims (23)
1. one kind is used for the light fixture used in barcode reader, comprising:
Light source, the light source can be used to emit illumination light along first path, and the illumination light has central axis；
Lens, the lens are located in the first path of the illumination light,
The lens are configurable for redirecting the central axis, so as to cause redirection central axis and along the second path pass
Broadcast the illumination light, the central axis of the central axis and the redirection is not parallel relative to each other, the center of the redirection
Intersection between the first plane of axis limit and the second plane, first plane perpendicular to second plane,
The lens include the first lens surface close to the light source, and first lens surface is located at the first path
It is interior and limited by the first free shape multinomial,
The lens further include the second lens surface far from the light source, and second lens surface is located at second tunnel
It is limited in diameter and by the second free shape multinomial；And
Window, the window are located in second path of the illumination light, and the window includes first window part and
Two window portions,
The first window is partially configured as the first part along illumination light described in third propagated, the illumination light
The first part be a part of the irradiation of the illumination light on the first window part, the third path is along institute
State the first plane at least 25 degree the angle of divergence and there is at most 8 degree of the angle of divergence along second plane,
Second window portion is configurable for the second part along illumination light described in the 4th propagated, the illumination light
The second part be a part of the irradiation of the illumination light on second window portion, the 4th path is along institute
State the first plane at most 20 degree the angle of divergence and there is at most 8 degree of the angle of divergence along second plane.
2. light fixture as described in claim 1, which is characterized in that the first window part includes having multiple lens cells
The lens array of part, each of the multiple lens element, which has, to be changed in a first direction and protects in a second direction
Hold the first constant lenticular element surfaces, the first direction second direction parallel and described with first plane with it is described
Second plane is parallel.
3. light fixture as claimed in claim 2, which is characterized in that first lenticular element surfaces are existed by radius of curvature
Semicircle restriction between 0.4mm and 0.6mm.
4. light fixture as claimed in claim 2, which is characterized in that each of the multiple lens element has
The pitch of 0.4mm to 0.6mm.
5. light fixture as claimed in claim 2, which is characterized in that each of the multiple lens element also has the
Two surfaces, the second surface change in said first direction and keep constant in this second direction, and described second
Surface is opposite with the first surface.
6. light fixture as claimed in claim 5, which is characterized in that second lenticular element surfaces are existed by radius of curvature
1.4mm the semicircle restriction between 1.6mm.
7. light fixture as described in claim 1, which is characterized in that the first window part and second window portion
Ratio between 3 to 2 and 4 to 1.
8. light fixture as described in claim 1, which is characterized in that in the first surface and the second surface at least
One is defined by the formula:
Wherein:
C is curvature；
r2=x2+y2；
K is at least one the constant of the cone in the first surface and the second surface；
M and N is polynomial maximum order；
I and j is the operation index for indicating the polynomial order；
AijIt is coefficient associated with the polynomial order；
EijIt is higher order polynomial；And
X and y is perpendicular on the central axis of the redirection and coordinate plane centered on the central axis of the redirection
Point.
9. light fixture as described in claim 1, which is characterized in that the lens provide to be increased on the axis between 25x and 35x
Benefit.
10. light fixture as described in claim 1, which is characterized in that the combination of the lens and the window provide 8x and
On-axis gain between 22x.
11. light fixture as described in claim 1, which is characterized in that when the illumination light leaves the window, the photograph
Between the 50% and 75% of the radiation intensity total amount of Mingguang City in +/- 5 degree of the central axis of the redirection, the radiation intensity
The cross-sectional samples measurement extended along first plane is parallel to.
12. light fixture as described in claim 1, which is characterized in that the lens are collimation lenses.
13. light fixture as described in claim 1, which is characterized in that the barcode reader includes having along FOV plane
The linear imaging component of the visual field FOV of extension, and wherein the FOV plane is parallel to first plane.
14. light fixture as described in claim 1, which is characterized in that first lens surface and second lens measure
Face is arranged such that along the central axis with first lens surface the first tangent tangential plane and along described heavy
The central axis of orientation second tangential plane tangent with second lens surface is intersected with inclination angle.
15. light fixture as claimed in claim 14, which is characterized in that the inclination angle is between 25 degree and 40 degree.
16. one kind is used for the light fixture used in barcode reader, comprising:
Light source, the light source can be used to emit illumination light along first path, and the illumination light has central axis；And
Lens, the lens are located in the first path of the illumination light,
The lens are configurable for redirecting the central axis, so as to cause redirection central axis and along the second path pass
Broadcast the illumination light, the central axis of the central axis and the redirection is not parallel relative to each other, the center of the redirection
Intersection between the first plane of axis limit and the second plane, first plane perpendicular to second plane,
The lens include the first lens surface close to the light source, and first lens surface is located at the first path
It is interior and limited by the first free shape multinomial,
The lens further include the second lens surface far from the light source, and second lens surface is located at second tunnel
It is limited in diameter and by the second free shape multinomial,
Wherein first lens surface and second lens surface are arranged such that along the central axis and described the
The first tangent tangential plane of one lens surface and along the redirection central axis and second lens surface it is tangent
Second tangential plane is intersected with inclination angle.
17. light fixture as claimed in claim 16, which is characterized in that in the first surface and the second surface extremely
Few one is defined by the formula:
Wherein:
C is curvature；
r2=x2+y2；
K is at least one the constant of the cone in the first surface and the second surface；
M and N is polynomial maximum order；
I and j is the operation index for indicating the polynomial order；
AijIt is coefficient associated with the polynomial order；
EijIt is higher order polynomial；And
X and y is perpendicular on the central axis of the redirection and coordinate plane centered on the central axis of the redirection
Point.
18. light fixture as claimed in claim 16, which is characterized in that the lens provide to be increased on the axis between 25x and 35x
Benefit.
19. light fixture as claimed in claim 16, which is characterized in that the inclination angle is between 25 degree and 40 degree.
20. light fixture as claimed in claim 16, further comprises: window, the window are located at the institute of the illumination light
It states in the second path, the window includes first window part and the second window portion,
The first window is partially configured as the first part along illumination light described in third propagated, the illumination light
The first part be a part of the irradiation of the illumination light on the first window part, the third path is along institute
State the first plane at least 25 degree the angle of divergence and there is at most 8 degree of the angle of divergence along second plane,
Second window portion is configurable for the second part along illumination light described in the 4th propagated, the illumination light
The second part be a part of the irradiation of the illumination light on second window portion, the 4th path is along institute
State the first plane at most 20 degree the angle of divergence and there is at most 8 degree of the angle of divergence along second plane.
21. light fixture as claimed in claim 16, which is characterized in that the lens have height and width, and wherein
Depth-width ratio is between 1.25 to 1 and 1.75 to 1.
22. a kind of illuminate the mesh calibration method to be read by barcode reader, which comprises
Light source is provided, the light source can be used to emit illumination light along first path, and the illumination light has central axis；
Make the lens in the first path of the illumination light by being located at the illumination light,
The lens are configurable for redirecting the central axis, so as to cause redirection central axis and along the second path pass
Broadcast the illumination light, the central axis of the central axis and the redirection is not parallel relative to each other, the center of the redirection
Intersection between the first plane of axis limit and the second plane, first plane perpendicular to second plane,
The lens include the first lens surface close to the light source, and first lens surface is located at the first path
It is interior and limited by the first free shape multinomial,
The lens further include the second lens surface far from the light source, and second lens surface is located at second tunnel
It is limited in diameter and by the second free shape multinomial；And
When making operation of the illumination light by the lens, make the illumination light by being located at described the of the illumination light
Window in two paths, the window include first window part and the second window portion,
The first window is partially configured as the first part along illumination light described in third propagated, the illumination light
The first part be a part of the irradiation of the illumination light on the first window part, the third path is along institute
State the first plane at least 25 degree the angle of divergence and there is at most 8 degree of the angle of divergence along second plane,
Second window portion is configurable for the second part along illumination light described in the 4th propagated, the illumination light
The second part be a part of the irradiation of the illumination light on second window portion, the 4th path is along institute
State the first plane at most 20 degree the angle of divergence and there is at most 8 degree of the angle of divergence along second plane.
23. method as claimed in claim 22, which is characterized in that when the illumination light leaves the window, the illumination
Between the 50% and 75% of the radiation intensity total amount of light in +/- 5 degree of the central axis of the redirection, the radiation intensity edge
Be parallel to the cross-sectional samples measurement that first plane extends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110110789.6A CN112906410B (en) | 2018-04-13 | 2019-04-12 | Illumination assembly for use in a bar code reader and associated apparatus and methods |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15/952,786 US10268854B1 (en) | 2018-04-13 | 2018-04-13 | Illumination assemblies for use in barcode readers and devices and methods associated therewith |
| US15/952,786 | 2018-04-13 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110110789.6A Division CN112906410B (en) | 2018-04-13 | 2019-04-12 | Illumination assembly for use in a bar code reader and associated apparatus and methods |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110378159A true CN110378159A (en) | 2019-10-25 |
| CN110378159B CN110378159B (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910294769.1A Active CN110378159B (en) | 2018-04-13 | 2019-04-12 | Illumination assembly for use in a bar code reader and associated apparatus and method |
| CN202110110789.6A Active CN112906410B (en) | 2018-04-13 | 2019-04-12 | Illumination assembly for use in a bar code reader and associated apparatus and methods |
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| Application Number | Title | Priority Date | Filing Date |
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| Country | Link |
|---|---|
| US (3) | US10268854B1 (en) |
| CN (2) | CN110378159B (en) |
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| USD918210S1 (en) * | 2019-04-04 | 2021-05-04 | Zebra Technologies Corporation | Data capture device |
| US11227173B2 (en) | 2020-02-18 | 2022-01-18 | Datalogic IP Tech, S.r.l. | Virtual-frame preprocessing for optical scanning |
| US11665410B2 (en) | 2020-03-10 | 2023-05-30 | Cognex Corporation | Modular vision systems and methods |
| US11281868B2 (en) | 2020-03-10 | 2022-03-22 | Cognex Corporation | Modular vision system and methods |
| USD994669S1 (en) | 2021-06-09 | 2023-08-08 | Zebra Technologies Corporation | Data capture device |
| DE102021128496B4 (en) | 2021-11-02 | 2023-08-10 | Enno Klaus Henze | Surface mount cabling system |
| US11893450B2 (en) | 2021-12-06 | 2024-02-06 | Datalogic IP Tech, S.r.l. | Robust optical aimer for triangulation-based distance measurement |
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Also Published As
| Publication number | Publication date |
|---|---|
| DE102019109726B4 (en) | 2020-09-17 |
| US10268854B1 (en) | 2019-04-23 |
| CN112906410A (en) | 2021-06-04 |
| CN112906410B (en) | 2024-03-15 |
| US20190318142A1 (en) | 2019-10-17 |
| CN110378159B (en) | 2021-02-02 |
| DE102019109726A1 (en) | 2019-10-17 |
| US20210042484A1 (en) | 2021-02-11 |
| US11256889B2 (en) | 2022-02-22 |
| US10817687B2 (en) | 2020-10-27 |
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